Spindle for net making machines



INVENTOR.

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ATTORNEY Jan. 9,, 1934. Y. OKUMA SPINDLE FOR NET MAKING MACHINES Filed Nov. 16, 1932 FQQL 2W igjl,

Patented Jan. 9, 1934 UNITED STATES PATENT OFFICE Yeiichi Okuma, Fujitsuka-Cho, Higashi-Ku, Nagoya-Ski, Aichi-Ken, Japan Application November 16, 1932 Serial No. 642,958

2 Claims.

The invention relates to improvements in spindles for net making machines and the object of the invention is to provide a spindle adapted to permit thread to be issued from bobbins on which the thread is wound, under a constant tension and prevent the thread from being freely issued.

In the accompanying drawing:

Fig. 1 is a front elevation of a spindle embodying the invention.

Fig. 2 is a transverse vertical section of Fig. 1.

Fig. 3 is a fragmentary sectional view similar to Fig. 2, but a thread guide member being in its upward position.

Fig. 4 is an enlarged perspective view of Fig. 3.

Fig. 5 is a fragmentary sectional view illustrating a manner for setting the spindle on a spindle carrier.

Fig. 6 is an enlarged perspective view of Fig. 5.

Fig. '7 is a plan view of the base member of the spindle, a cap being removed.

Fig. 8 is a plan view of the guard ring for the connection between the spindle and the spindle carrier.

In net making machines of a kind in which spindles are propelled in a series of race-ways provided in a net making machine for twisting threads issuing from bobbins in the spindles together and for crossing the threads to form meshes of a net fabric, it is essential that the threads must be drawn from bobbins in the spindles under a certain and uniform tension, in order to obtain a net fabric having tight crossing and regular meshes. The feature of the invention is that the threads can not be drawn from the bobbin unless they are pulled with a certain force, so that the threads are under a constant tension.

Referring now to the drawing, 1 indicates a spindle casing, which is of a truncated conical form and at the top provided with a tubular extension 2 integral or connected with the casing, an outlet tube 3 integral or connected with said tubular extension and a base member 4 suitably fixed thereon for the connection with a spindle carrier 10 as hereinafter will be described.

There is a thread guide member 11 within the casing l, which consists of a block substantially rectangular in cross section and formed near the end of either side with a longitudinal guide groove 12 adapted to engage with each side edge 13 of a slot 13 formed in the upper part of the casing and formed opposite the side engaging with the slot 13 with a recess 14 having a substantially arched surface and a hole 15 longitudinally extending across said arched recess, and formed at the top with the a tubular member 11. The thread guide member 11 is normally in position with the lower end resting on the bottom edge 13 of the slot 13 as shown in Fig. 2 by a coiled spring 16 en- 0 circling the tubular member 11' between the inner shoulder 17 of the casing 1 and a collar 18 fixed on said tubular member.

A roller housing 19 with a finger piece 19 is pivotally mounted on the thread guide member 5 as indicated at 20, a slot 21 being formed in the casing 1 opposite the slot 13 for receiving the" roller housing and permitting its longitudinal movement. The roller housing carries a roller 22, with ratchet teeth on the circumferential sur- 70, face, by means of a pin 23 fixed therein, and is normally held in position with the roller engaged with the arched surface of the recess 14 as shown in Fig. 4 by a coiled spring 24 encircled the tubular member 11' between an adjustable collar 25 screwed on said tubular member and a spring shoe 26 movably inserted on said tubular member to engage with a part 19" of the roller housing extending upward somewhat beyond the upper end of the thread guide member 11 so that the 0 roller housing will tend to turn on the pivots 20 in the clockwise direction in reference to Figs. 2,

3 and 4 by the coiled spring 24..

A pawl member 27 is pivotally mounted on the thread guide member 11 as indicated at 28, which 5 is formed at the upper end with a pawl 27 adapted to engage with the ratchet of the roller 22 and at the lower end with a T end 27" adapted to engage with the shoulders 21 of the slot 21 in the casing 1 as the thread guide member longi- 0 tudinally moves for the purpose as will hereinafter be described. The pawl member 27 is normally held in position with the pawl 27 in engagement with the ratchet teeth of the roller 22 by a spring 29 which is at one end secured on the thread guide memberll, at the other end on the T end 27" of said pawl member and is at an intermediate point supported on the pivot 28 by means of a loop 29 formed in said spring, as shown in Fig. 4.

The base member 4 is at its top formed with two arched flanges 4, 4 disposed in diametrically opposite relation to leave spaces 5, 5 as shown in Fig. 7 and to fit within the lower end of the easing 1, and is also at its bottom formed with two foot members 4", 4" disposed below the spaces 5, 5 respectively to inwardly extend their toes opposite each other for engaging with the head 10' of the spindle carrier 10 adapted to be propelled in the race-ways in a net making machine 11 (not shown) for twisting together and crossing threads, as shown in Fig. 2. An inverted cup 8 is mounted on the base member 4 to fit within the lower end of the casing 1 and to co-operate with said base member to render the spaces 5, 5 to' form two opposite openings, and is provided with a central hole 9 at the bottom for permitting the arbor 30 of a bobbin 30 which is placed in position within the casing 1 through an opening 31 provided in said casing, as shown in Fig. 2. The opening 31 is near its bottom edge formed with two opposite tongues 31, 31 which are extended from the side edges along the circumference of the casing 1 and sufficiently turned in to engage with a disc 32 secured near the lower end of the arbor 30' of the bobbin 30 for preventing said bobbin from being pulled up.

A guard ring 33 is mounted in the base member 4 for a guard to prevent the head 10' of the spindle carrier 10 from laterally getting out from the foot members 4", 4 of said base member after said foot members have been set in engagement with said head. The guard ring 33 is at its top formed with two opposite upstanding segmental members 33, 33 having shouldered upper ends 33", 33", and with two opposite openings 34, 34 merged into the central opening between said segmental members to register with the central opening 6 provided in the body of the base member 4, as shown in Fig. 8. The guard ring is detachably mounted in the base member 4 by inserting the projections 33, 33' through the central opening 6 of the base member 4 and causing to engage the shoulders 33", 33" with the upper edge of the central hole 6, and is held in position by coiled springs 35, 35 disposed between the bottom of the cup member 9 and the horizontal bases of the projections 33, 33 of the guard ring 33 through holes '7, 7 provided in the body of the base member 4 in diametrically opposite relation.

In order to hold the bobbin 30 in position within the spindle casing 1, a clip member 37 is mounted on the base member 4 with its either ends engaged with the sides of the openings 5, 5 formed above the foot members 4", 4 respectively by said base member and the cup member 9, whereby the lower end of the arbor 30' of the bobbin 30 is firmly clipped.

In operation, the bobbin 30 with a thread wound thereon is held in position within the easing 1 by forcibly inserting the lower end of the arbor 30' of said bobbin into the clip 3'7, and the thread is led upward from said bobbin through the hole 15 of the thread guide member 11 and passing on between the arched surface of the recess 14 and the roller 22 and through the tubular member 11, the tubular extension 2 and the outlet tube 3. The thread guide member 11 is normally held in its downward position as shown in Fig. 2 by the coiled spring 16, and the roller 22 is forced against the arched surface of said thread guide member by the spring 24 acting on the roller housing 19, as aforementioned, and said roller is prevented from rotating by the pawl 2'? in engagement with the ratchet. It will be seen that the thread is normally held between the arched surface of the recess 14 and the ratchet surface of the roller 22 so that the thread can not freely issue.

When the thread is pulled upward, the thread guide member 11 is caused to be moved upward together with the thread against the coiled spring 16 until the T end 27 of the pawl member 27 has engaged with the shoulders 21, 21 of the slot 21 so that the pawl 2'7 disengages with the ratchet of the roller 22 to permit said roller to be rotated, and then the thread will be allowed to issue upward. Thus, the useless issuing of the thread is avoided.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I claim:

1. A spindle for net making machines comprising a casing having a thread discharge nipple at one end and a bobbin receiving chamber at the other end, means for mounting a bobbin in said chamber, a tubular guide longitudinally movable in the casing between the bobbin chamber and the nipple to guide the thread passing from the bobbins to the nipple, a spring mounted in the casing normally tending to press the tubular guide toward the bobbin chamber, spring-pressed gripping means carried by the tubular guide normally operating to engage the thread passing through said guide, the engagement of the gripping means with the thread operating to move the guide against the action of its spring toward the nipple as the thread is drawn from the bobbin through the nipple, and means operating to trip the gripping means from the thread as the guide approaches the nipple, the release of the guide from the thread permitting the return of the guide to its initial position so that its gripping means again engages the thread to repeat the tensioning of the thread.

2. A spindle for net making machines comprising a casing having a bobbin receiving chamber at one end and a thread discharging nipple at the other end, means for mounting a bobbin in said chamber, a guide longitudinally movable in the casing between the bobbin chamber and the nipple consisting of a longitudinally grooved block slidably mounted in the casing and a tubular extension therefor providing'a guideway for the thread between the bobbin and the nipple, a spring mounted in the casing normally pressing the guide toward the bobbin chamber, a housing pivoted on the block and carrying a ratchet roller entering a recess in the block to engage the thread passing through the groove in said block, a spring mounted on the tubular extension of the guide and normally tending to move the housing to press the ratchet roller to clamp the thread against the block so that the guide is moved against the action of its spring toward the nipple to tension the thread as it is drawn from the bobbin through the nipple, and a spring-pressed pawl mounted on the block normally operating to engage the ratchet roller to hold the latter against the pull of the thread, and tripping means for releasing the pawl from the ratchet roller as the guide approaches the nipple to disengage the thread from the guide so that the latter is returned to its initial position by the action.

YEIICI-II OKUMA.

LOO 

